i'm not sure why, but more and more, software installations tend to assume you have just one partition on your machine - that, or you absolutely don't mind it getting filled up with things you don't really know.
lost? let me explain: i'm in the habit of breaking up my harddisk into partitions. i used to leave 5GB on C: for OS files, taking into account that some software will always install some things on C: even if you tell the setup wizard to install on some other partition. that was enough about 4 years back. i upped it to 7.5GB sometime back, and finally to 10GB. now it seems even that isn't enough. i installed Visual Studio 2008 recently, and my free space on C: has plummeted down to less than 2.5GB - without enabling hibernate. i dread what would happen if i installed Adobe products - at least another 400MB would go should i install CS3 Design. yet i have over 14 GB lying fallow on a partition i reserved for installing application software. even with CCleaner installed, i can't free up any space. granted, a heavier-duty application can help with that, but i don't have much hope in that direction.
darn shame what they do to my disk space.